Drill cable snap or cracker



\NVENTOR ATTORNEY July 4, 1933. D. c. MOFFETT DRILL CABLE SNAP OR CRACKER Filed June 15 1952 176mm dmoffew as oil Wells, gas

Amusin -v filed] his 15, serial-11810.:srmisr 'z 7 device for use; in the drilling oi; wells, s'uch wells'iorgwaterjwellsjlof any depth withcableltoolsif ff The primary obj ac r the invention isi'the provisionof a deyiceof character where} in theflsame is adaptedfor use between string ofcable drilling tools'and a- Wire drill ing and-t0 eliminate the terrific shocks,

-ingline to impart the necessary flexibility i fylews intheidrawing r v .Referringfto the' -dravving in. detail, the

device is indicated generally-at and in springiness and snap necessaryfor fast drill;

" jars incident to the Operation of the drilling vtools by transmission" tothefdrilling ina- 'chinery through the'wirejline.

' be thrown into engagement With the-earth with percussive force, orinfother W0rds, th e v cable inusthave a necessary an1ount. o-f,s nap? orpossess a certain elastic'q'ualityduringthe drillingioperation and also to allow the cable 1 to stretch and r'ebound and thus gi'ying to the tools the percussive-action required.

f vision of a" device of this "'character,{ "wherein 3 its constructlonv assures tothe tools-the: re-- quired snap or crackeraction'fsoi'callediand also to assure: the required fiexingiahd absorption of shocks and'i'jars-incidenttothe drilling fop ation,-th e device being of'noyel form andisreadilyattachable to a string or cable drilling tools and a Wire drilling line.

A further object of the invention isjthe provision offadevice ofth-is character, wheref 7 in 1ts constructlon 1s such as to assurexlongev zity andimaximum earingquauty; as ell as strength and durability,without liability of? inefficiency in the--quick drilling operation I p "for the 'drillingof oil gas" and Water Wells; 9

any depth With cable tools and is,s1lsceptible of manufacture at a minimum cost;

- In the accompanying-drawing lz r J pnrilii'joennnlsnnron. CEIAQKER:

It is a fact in theart ofW'ell to obtain best. results. the drilling tools mustthe" 'n ention 1s; thepro wsoms:Diner:-Qm'.:

t oncper yl' sestie s ww g" d t th'e niake-up'i ofl the'device. I

in nt n r es-@612 m; 10 cra kl isfirsLl-b ehl i ii n f hei eri Conm -d 1e @QQ T- Il QQ"Wl ihQ 'illV n iQn e'ure 2; a i r n y nlarg d S e: v

elev i s 3 is a ct il l iew s inei fi+3l Similar reference characters indicatecore respond ng-parts V thrQu'ghoutthe several;

cludes a solid-rubber core. 5 of any required feet length and at its tapered end 6 recelves therein the ire 'drillingiine f? of an 011 drllhngmachine; the'end S of this line 7 ,ilength' preferably approximately.twenty five embedded in" theicbre 5 being'lcentrallyl catedandisanchoredtherein at 9 1' i Applied toithecore5 efitern'ally'ofthe f is 1 I {is YWraPP f o 'l y r b iong 90 d 10 a nd 11 respectively; these being disp d; f f. H

cord are 1' carried throughout, if'the major;

automobile. tire shoe or casing with v the reas a. snap or; crackerbetween the 7 Wire drill in theirzwrapped condition in oppositedirec}; V i I v tlons to each other and suchllayers {of strong f1;v 7' I 'sult of.longevity,- maniinunrW-e'aringquality, a I elasticityandefficiency inthe devicelforusej 7. I'-

in'g line 7 andastringofcable d rillingtoolsj" 5- for associationtherewith I ;-The protective covering 121m;

with astring of cable drillingitools.

r'note'flfrom" the 'taperedzend 6' of the c0refi's'1; 7

formed with a fiaredforbulged head orter, niinal 13 foracconimoda-tion in a separable 1 coupling 14 for the' connection of the'device" l Inithe use ofthe' deyice the'desireld A 1 f quired snap'isrpresent during theoperation I offthe drilling tools so as to accomplish a "percussive force upon engageinent'ofthe: 5 a drilling tools with the earth inthe making 'of'a welland also shocksand Vibrationsor ars are eliminated between the drilling tools and the drilling machinery in that such shocks and jars cannot be transmitted to the latter through the Wire drilling line which results in increased Wear to such machinery and also ease of operation thereof. By he use of the device constructed as heretofore stated it eliminates the necessity of the use of a large amount of manila rope which is commonly used With the drilling tools to give the same the required flexibility.

There Will be little Wear on the device on account of its being relatively short as comparable With substitutes and its extreme flexibility tends to keep the slack line tightened up at all times which will result in a great deal less Wear on the Wire line above the device. This device assures adrilling operation with dispatch and will enable the tools to strike harder as more of the force of the blow Will be transmitted to the Work and less to the line.

What is claimed is 1. A device of the character described comarisin a solid strai ht resilientcore twoply Wrappings of fibrous cord about the core, a protective coating enveloping the Wrapjpings and vulcanized thereto, the said Wrappings being reversely extended, and a Wire drill line anchored in one end of the core,

said protective coating being enlarged at the end of the core to form a head remote from 

